Title:
SURFACE-POTENTIAL DISTRIBUTION MEASURING DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/147660
Kind Code:
A1
Abstract:
A surface-potential distribution measuring device (70) is provided with a laser light source (13), a Pockels crystal (11) with a taper, a mirror, a photodetector (16) that detects the light intensity of laser light reflected by the mirror, a holding and mounting part (30) that holds and moves the Pockels crystal (11), a voltage correction database, and a computation unit that identifies an input voltage corresponding to a testing output voltage as the surface potential of an electric-field-reduction system (3). The Pockels crystal (11) is formed such that the cross-sectional size thereof varies in the axial direction. The holding and mounting part (30) has a protection part (31) for protecting the structure of the Pockels crystal (11), movement parts (35, 36) for moving the Pockels crystal (11) for the purpose of measuring the surface potential of the electric-field-reduction system (3), and a drive control unit (37) for controlling the movement parts (35, 36).
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Inventors:
FURUKAWA MASAAKI (JP)
TSUBOI YUICHI (JP)
YOSHIMITSU TETSUO (JP)
KUMADA AKIKO (JP)
HIDAKA KUNIHIKO (JP)
IKEDA HISATOSHI (JP)
TSUBOI YUICHI (JP)
YOSHIMITSU TETSUO (JP)
KUMADA AKIKO (JP)
HIDAKA KUNIHIKO (JP)
IKEDA HISATOSHI (JP)
Application Number:
PCT/JP2013/001872
Publication Date:
September 25, 2014
Filing Date:
March 19, 2013
Export Citation:
Assignee:
TOSHIBA MITSUBISHI ELEC INC (JP)
UNIV TOKYO (JP)
UNIV TOKYO (JP)
International Classes:
G01R31/34
Foreign References:
| JP2011022007A | 2011-02-03 | |||
| JPH07181211A | 1995-07-21 | |||
| JPH05196672A | 1993-08-06 | |||
| JPH03156379A | 1991-07-04 | |||
| JPH11133118A | 1999-05-21 | |||
| JPH08122381A | 1996-05-17 | |||
| JPH1038952A | 1998-02-13 | |||
| JPH05307057A | 1993-11-19 | |||
| JP2004525361A | 2004-08-19 | |||
| JP2011022007A | 2011-02-03 |
Other References:
AKIKO KUMADA; MASAKUNI CHIBA; KUNIHIRO HIDAKA: "The Direct Potential Distribution Measurement of Propagating Surface Discharge by Using Pockels Effect", TRANSACTIONS OF THE INSTITUTE OF ELECTRICAL ENGINEERS OF JAPAN A, vol. L18-A, no. 6, June 1998 (1998-06-01), pages 723 - 728
HIROKAZU MATSUMOTO; SHIGEYASU MATSUOKA; AKIKO KUMADA; KUNIHIKO HIDAKA: "Oscillatory Waveform Caused by Piezoelectric Vibration of Pockels Crystal and its Effective Suppression", IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING, vol. 6, 2011, pages 1 - 6, XP055241408, DOI: doi:10.1002/tee.20599
See also references of EP 2977775A4
HIROKAZU MATSUMOTO; SHIGEYASU MATSUOKA; AKIKO KUMADA; KUNIHIKO HIDAKA: "Oscillatory Waveform Caused by Piezoelectric Vibration of Pockels Crystal and its Effective Suppression", IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING, vol. 6, 2011, pages 1 - 6, XP055241408, DOI: doi:10.1002/tee.20599
See also references of EP 2977775A4
Attorney, Agent or Firm:
KIKUCHI, Osamu et al. (JP)
Kikuchi 治 (JP)
Kikuchi 治 (JP)
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